pentas lanceolata/tyrosine

α,α-Difluoro-benzyl phosphonates are currently the most popular class of phosphotyrosine mimetics. Structurally derived from the natural substrate phosphotyrosine, they constitute classical bioisosteres and have enabled the development of potent inhibitors of protein tyrosine phosphatases (PTP) and

The inhibition of protein tyrosine phosphatase 1B (PTP1B) is of substantial interest for the treatment of type-2 diabetes mellitus. Using an in vitro enzyme assay with human recombinant PTP1B 1,2,3,4,6-penta-O-galloyl-D-glucopyranose was isolated from the roots of Paeonia lactiflora as an inhibitor

Polybrominated diphenyl ethers (PBDEs) are widely used as flame retardants in consumer products. Humans can be exposed to PBDEs mainly through the inhalation of air or dust. Thus, PBDEs can affect respiratory and immune systems. In the present study, we investigated whether PBDEs stimulate bronchial

ALG-2 is a Ca(2+)-binding protein that belongs to the penta-EF-hand protein family and associates with several proteins, including annexin VII, annexin XI, and Alix/AIP1, in a Ca(2+)-dependent manner. The yeast two-hybrid system and a biotin-tagged ALG-2 overlay assay were carried out to

Chloramine-T (CAT) is commonly used in radiolabeling of bioactive molecules by halogenation. CAT is used to release radioactive elemental iodine by oxidation of its salts. Unfortunately, CAT is a strong oxidizing agent and can cause significant damage to peptides and proteins. This may lower the

1,2,3,4,6-penta-O-galloyl-beta-D-glucose (PGG), a polyphenolic compound isolated from Rhus chinensis Mill. PGG has been known to have anti-tumor, anti-angiogenic and anti-diabetic activities. The present study revealed another underlying molecular target of PGG in MDA-MB-231 breast cancer cells by

The catalytic role of the metal ion in bovine carboxypeptidase A (peptidyl-L-amino acid hydrolase; EC 3.4.12.2) is investigated by application of cryoenzymologic and electron paramagnetic resonance methods with use of the Co2+-reconstituted enzyme. Incorporation of 17O into oxygen-donor ligands

Tumor angiogenesis is a critical step for the growth and metastasis of solid tumors. Vascular endothelial growth factor (VEGF) is the most important angiogenic molecule associated with tumor-induced neovascularization. VEGF exerts its activity through binding to its receptor tyrosine kinase,

There is an urgent clinical need for chemotherapeutic and chemopreventive drugs for triple-negative breast cancer (TNBCa). Extending on our recent work, we hypothesize that the herbal compound 1,2,3,4,6-penta-O-galloyl-beta-D-glucose (PGG) can inhibit the growth and metastasis of TNBCa xenograft and

Opioid receptor antagonist properties of the mu opioid receptor selective peptide, BOC-Tyr-Lys-Lys-Trp-Trp-NH2 and its systematically modified analogues were determined in guinea pig ileum, mouse vas deferens and rabbit vas deferens bioassays to locate the necessary structural features to develop